Optical lens assembly, imaging lens module and electronic apparatus

ABSTRACT

An optical lens assembly includes at least two lens elements and at least one light blocking sheet. Each of the lens elements includes a connecting structure for aligning the two lens elements. Each of the connecting structures includes a connecting surface and a circular conical surface, and a receiving space is formed between the two lens elements. A vertical distance between the receiving space and an optical axis is shorter than a vertical distance between each circular conical surface and the optical axis. The light blocking sheet is received in the receiving space and has a polygonal opening, and an outside diameter of the light blocking sheet is smaller than or equal to a minimum diameter of each circular conical surface.

RELATED APPLICATIONS

The present application is a continuation of U.S. application Ser. No.15/592,558, filed May 11, 2017, which claims priority to TaiwanApplication Serial Numbers 106101054 and 106200576, both filed Jan. 12,2017, which are herein incorporated by reference.

BACKGROUND Technical Field

The present disclosure relates to an optical lens assembly and animaging lens module. More particularly, the present disclosure relatesto an optical lens assembly and an imaging lens module for a portableelectronic device.

Description of Related Art

With the popularity of personal electronic products and mobilecommunication products having camera functionalities, such as smartphones and tablet personal computers, compact imaging lens modules arein popular. The demand for compact imaging lens modules with highresolution and high image quality has also been increasingsignificantly.

A light blocking sheet is used to block unnecessary lights in theimaging lens module. However, a fake lens flare is still existed due tothe limited light blocking effect of the current light blocking sheetunder a high-intense light source.

In general, the light blocking sheet within the imaging lens module isdisposed between two adjacent lens elements. However, both theconnecting structure between the two adjacent lens elements and theengaging structure between each of the lens elements and the lightblocking sheet are unstable so that the lens elements and the lightblocking sheet are always deformed when an external force is applied.

SUMMARY

According to one aspect of the present disclosure, an optical lensassembly includes at least two lens elements and at least one lightblocking sheet. Each of the lens elements includes a connectingstructure for aligning the two lens elements. Each of the connectingstructures includes a connecting surface and a circular conical surface.The connecting surfaces of the two lens elements are connected to eachother, the circular conical surfaces of the two lens elements areconnected to each other for forming a receiving space between the twolens elements, and a vertical distance between the receiving space andan optical axis is shorter than a vertical distance between each of thecircular conical surfaces and the optical axis. The light blocking sheetis received in the receiving space and has a polygonal opening. Anoutside diameter of the light blocking sheet is smaller than an outsidediameter of each lens element, and the outside diameter of the lightblocking sheet is smaller than or equal to a minimum diameter of thecircular conical surface of each lens element. The polygonal opening hasa plurality of inner sides, an external angle formed between every twoinner sides adjacent to each other, which is less than 90 degrees, is θ,and the following condition is satisfied: 9.0 degrees<θ<33.0 degrees.

According to another aspect of the present disclosure, an imaging lensmodule include a barrel and the optical lens assembly as mentionedabove, in which the optical lens assembly is disposed in the barrel. Thepolygonal opening of the light blocking sheet of the optical lensassembly is corresponding to a minimum central opening of the barrel,and the minimum central opening is an aperture stop of the imaging lensmodule.

According to another aspect of the present disclosure, an electronicapparatus includes the abovementioned imaging lens module and an imagesensor. The image sensor is disposed on an image surface of the imaginglens module.

According to another aspect of the present disclosure, an imaging lensmodule includes a barrel and an optical lens assembly, in which theoptical lens assembly is disposed in the barrel. The optical lensassembly includes a plurality of lens elements and at least one lightblocking sheet. The light blocking sheet has a polygonal opening, andthe polygonal opening is corresponding to a minimum central opening ofthe barrel. The polygonal opening has a plurality of inner sides, aninner diameter of the polygonal opening of the light blocking sheet isφi, a length of each inner side is s, a quantity of the lens elements isN, and the following conditions are satisfied: 7.1<φi/(s/2)<30; and5≤N≤9.

According to another aspect of the present disclosure, an electronicapparatus includes the abovementioned imaging lens module and an imagesensor. The image sensor is disposed on an image surface of the imaginglens module.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1A is a schematic view of an optical lens assembly according to anembodiment of the present disclosure;

FIG. 1B is an exploded view of the optical lens assembly in FIG. 1A;

FIG. 10 is a three dimensional view of a light blocking sheet of theoptical lens assembly in FIG. 1A;

FIG. 1D is a plan view of the light blocking sheet in FIG. 1C;

FIG. 1E is an exploded view of the light blocking sheet in FIG. 1C;

FIG. 1F is a partially separation schematic view of the light blockingsheet in FIG. 1C;

FIG. 2A is a schematic view of an imaging lens module according toanother embodiment of the present disclosure;

FIG. 2B is a schematic view of a light blocking sheet in FIG. 2A;

FIG. 3 is a schematic view of an electronic apparatus according to yetanother embodiment of the present disclosure;

FIG. 4A is a schematic view of an optical lens assembly according to a1st example of the present disclosure;

FIG. 4B is an exploded view of the optical lens assembly according tothe 1st example of the present disclosure;

FIG. 4C is a schematic view of a light blocking sheet according to the1st example of the present disclosure;

FIG. 4D is a schematic view of another light blocking sheet according tothe 1st example of the present disclosure;

FIG. 5 is a schematic view of a light blocking sheet of an optical lensassembly according to a 2nd example of the present disclosure;

FIG. 6 is a schematic view of a light blocking sheet of an optical lensassembly according to a 3rd example of the present disclosure;

FIG. 7 is a schematic view of a light blocking sheet of an optical lensassembly according to a 4th example of the present disclosure;

FIG. 8 is a schematic view of an image capturing device according to a5th example of the present disclosure;

FIG. 9A is a schematic view of an electronic apparatus according to a6th embodiment of the present disclosure;

FIG. 9B is a perspective schematic view of the electronic apparatus inFIG. 9A;

FIG. 9C is a schematic view of the electronic apparatus in FIG. 9A fromanother view angle;

FIG. 9D is a block diagram of the electronic apparatus in FIG. 9A;

FIG. 10 is a schematic view of an electronic apparatus according to a7th example of the present disclosure; and

FIG. 11 is a schematic view of an electronic apparatus according to an8th example of the present disclosure.

DETAILED DESCRIPTION

Please refer to FIG. 1A, FIG. 1B and FIG. 10. FIG. 1A is a schematicview of an optical lens assembly according to an embodiment of thepresent disclosure, FIG. 1B is an exploded view of the optical lensassembly in FIG. 1A, and FIG. 10 is a three dimensional view of a lightblocking sheet 1300 of the optical lens assembly in FIG. 1A. In FIG. 1Aand FIG. 1B, the optical lens assembly includes at least two lenselements and at least one light blocking sheet 1300. As shown in FIG.1A, the optical lens assembly includes two lens elements 1100, 1200. Thelens element 1100 and the lens element 1200 include a connectingstructure 1110 and a connecting structure 1210, respectively, foraligning an optical axis of the lens element 1100 and an optical axis ofthe lens element 1200. The connecting structures 1110, 1210 include,respectively, connecting surfaces 1111, 1211 and circular conicalsurfaces 1112, 1212. The connecting surfaces 1111, 1211 of the two lenselements 1100, 1200 are correspondingly connected to each other, thecircular conical surfaces 1112, 1212 of the two lens elements 1100, 1200are correspondingly connected to each other for forming a receivingspace 1400 between the two lens elements 1100, 1200. A vertical distancebetween the receiving space 1400 and an optical axis is shorter than avertical distance between each of the circular conical surfaces 1112,1212 and the optical axis. The light blocking sheet 1300 is received inthe receiving space 1400, in which an outside diameter φ of the lightblocking sheet 1300 is smaller than an outside diameter D1 of the lenselement 1100 and an outside diameter D2 of the lens element 1200. Theoutside diameter φ of the light blocking sheet 1300 is smaller than orequal to a minimum diameter C1 of the circular conical surface 1112 ofthe lens element 1100 and a minimum diameter C2 of the circular conicalsurface 1212 of the lens element 1200. When a width parallel to theoptical axis of the receiving space 1400 is R, R is ranged from 0.01 mmto 0.05 mm.

FIG. 1D is a plan view of the light blocking sheet 1300 in FIG. 10. Asshown in FIG. 1D, the light blocking sheet 1300 has a polygonal opening1301, and the polygonal opening 1301 has a plurality of inner sides.When an external angle formed between every two inner sides adjacent toeach other, which is less than 90 degrees, is θ, the following conditionis satisfied: 9.0 degrees<θ<33.0 degrees. Therefore, a specific lightray can be blocked precisely so that the image viewed by naked eyes canbe truly presented. Accordingly, a better image quality can be achievedunder a high-intense light source.

Please refer to FIG. 1E and FIG. 1F. FIG. 1E is an exploded view of thelight blocking sheet 1300 in FIG. 10, and FIG. 1F is a partiallyseparation schematic view of the light blocking sheet 1300 in FIG. 10.As shown in FIG. 1E, the light blocking sheet 1300 is a composite lightblocking sheet and includes a first surface layer 1311, a second surfacelayer 1312 and an inside substrate layer 1313. The first surface layer1311 has a first opening 1311 a, the second surface layer 1312 has asecond opening 1312 a, and the inside substrate layer 1313 has asubstrate opening 1313 a. The inside substrate layer 1313 is disposedbetween the first surface layer 1311 and the second surface layer 1312to connect the first surface layer 1311 and the second surface layer1312. The first opening 1311 a, the second opening 1312 a and thesubstrate opening 1313 a are correspondingly disposed along the opticalaxis to form the polygonal opening 1301. Because the strength of thematerial can be controlled easily by utilizing the composite material, apolygonal opening with high quality can be manufactured to reduce thethickness of the light blocking sheet. Moreover, a thinner lightblocking sheet is favorable to be received in the receiving space andwill not affect the accuracy of assembling the lens elements. In FIG.1F, the first surface layer 1311 and the second surface layer 1312 aretorn by an external force and are distorted due to a non-uniformextension. However, under normal circumstance, the first surface layer1311 is tightly connected with the second surface layer 1312 via theinside substrate layer 1313.

Furthermore, the inside substrate layer 1313 of the light blocking sheet1300 is made of a plastic material. In details, the plastic material ofthe inside substrate layer 1313 can be but not limited to black ortransparent polycarbonate (PC), polyethylene terephthalate (PET) orpolymethylmethacrylate (PMMA). The first surface layer 1311 and thesecond surface layer 1312 of the light blocking sheet 1300 are made ofblack carbon-containing materials. Thus, it is favorable to prevent thelight blocking sheet 1300 from warping and to obtain a flat lightblocking sheet after a stamping process.

In FIG. 1B, when an angle between each of the circular conical surfaces1112, 1212 of the lens elements 1100, 1200 and the optical axis is β,the following condition is satisfied: 0 degrees<β<40 degrees. Thecorresponding circular conical surfaces 1112, 1212 allow the adjacentlens elements 1100, 1200 to be aligned to each other so that the anglesbetween the circular conical surfaces 1112, 1212 and the optical axisare the same. When the abovementioned conditions are satisfied, itmaintains the accurate alignment with the optical axis and reduces thefailure of the assembling process.

In FIG. 1B, the lens elements 1100, 1200 can further include, flatsurfaces 1401, 1402, respectively. The flat surfaces 1401, 1402 arecorresponding to the receiving space 1400 and vertical to the opticalaxis. Accordingly, an appropriate space is provided for receiving thelight blocking sheet 1300. Thus, the light blocking sheet 1300 will notbe affected by the unnecessary external force in the receiving space,and the deformation of the light blocking sheet 1300 can be furtherprevented.

In the optical lens assembly, at least one of the two lens elements isaligned to the light blocking sheet via the circular conical surfacethereof. In details, each of the circular conical surfaces 1112, 1212 ofthe lens elements 1100, 1200 is not only utilized to align the lenselements with each other but also is favorable to align the optical axisthereof to a central axis of the light blocking sheet 1300 as shown inFIG. 1A. Therefore, the assembling process of the lens elements becomessmoothly, and the entire structure will be simplified.

Referring back to FIG. 1D, when an inner diameter of the polygonalopening 1301 of the light blocking sheet 1300 is φi (that is, aconnecting line through the optical axis between any two of the innersides of the polygonal opening 1301 of the light blocking sheet 1300),and the outside diameter of the light blocking sheet 1300 is φ, thefollowing condition is satisfied: 0.47<φi/φ<0.90. Accordingly, theoptical lens assembly is favorable to be applied in an imaging lensmodule with a large aperture. In particular, the term “large aperture”means the imaging lens module has an f-number less than 2.4. However,the present disclosure is not limited thereto. More particularly, theinner diameter of the polygonal opening 1301 and the outside diameter ofthe light blocking sheet 1300 satisfy the following condition:0.55<φ/φ<0.90. Thus, a light blocking sheet, which is applied forproviding an accurate light blocking range, can be placed in a compactreceiving space.

Please refer to FIG. 2A and FIG. 2B. FIG. 2A is a schematic view of animaging lens module 2000 according to another embodiment of the presentdisclosure, and FIG. 2B is a schematic view of a light blocking sheet2010 in FIG. 2A. In FIG. 2A, the imaging lens module 2000 includes abarrel 2001 and an optical lens assembly, and the optical lens assemblymentioned herein can be but not limited to the optical lens assembly inFIG. 1A. In details, the optical lens assembly includes several lenselements (2100, 2200, 2300, 2400, 2500, 2600) and at least one lightblocking sheet (2010, 2020, 2030). The light blocking sheet 2010 isreceived in a receiving space 2040 between the lens element 2100 and thelens element 2200, the light blocking sheet 2020 is received in areceiving space (the reference numerals are omitted) between the lenselement 2200 and the lens element 2300, and the light blocking sheet2030 is received in a receiving space (the reference numerals areomitted) between the lens element 2300 and the lens element 2400.

As shown in FIG. 2A and FIG. 2B, the light blocking sheet 2010 has apolygonal opening 2011, and the polygonal opening 2011 has a pluralityof inner sides. When an inner diameter of the polygonal opening 2010 ofthe light blocking sheet 2010 is φi, a length of each inner side is s,and a quantity of the lens elements is N, the following conditions aresatisfied: 7.1<φi/(s/2)<30; and 5≤N≤9. Therefore, a specific light raycan be blocked precisely when the light blocking sheet satisfied theabovementioned conditions is configured so that the image viewed bynaked eyes can be truly presented. Accordingly, a better image qualitycan be achieved under a high-intense light source.

In FIG. 2A, a minimum central opening 2002 of the barrel 2001 can be anaperture stop of the imaging lens module 2000. The polygonal opening2011 of the light blocking sheet 2010 of the optical lens assembly iscorresponding to the minimum central opening 2002 of the barrel 2001,that is, the polygonal opening 2011 and the minimum central opening 2002are arranged coaxially. Accordingly, the optical structure can besimplified, and it is favorable to satisfy the demand for compactimaging lens modules.

In this embodiment, the lens element, the light blocking sheet and theconfiguration therebetween can satisfy the conditions of FIGS. 1A-1F.Thus, it will not to be repeated herein. In addition, the receivingspaces between the lens elements can not only receive the light blockingsheet but also receive other optical components, such as lens elementsor mirror rings.

FIG. 3 is a schematic view of an electronic apparatus 3000 according toyet another embodiment of the present disclosure. In FIG. 3, theelectronic apparatus 3000 includes an imaging lens module and an imagesensor 3100. In particular, the imaging lens module is but not limitedto the imaging lens module 2000 in FIG. 2A. Therefore, a specific lightray can be blocked precisely so that the image viewed by naked eyes canbe truly presented. Accordingly, a better image quality can be achievedunder a high-intense light source. The electronic apparatus 3000 canfurther include but is not limited to a display, a control unit, astorage unit, a random access memory unit (RAM) or a read-only memoryunit (ROM) or a combination thereof. Moreover, the electronic apparatus3000 can be applied to but is not limited to a 3D (three-dimensional)image capturing applications, in products such as digital cameras,mobile devices, digital tablets, smart TV, surveillance devices, gameconsoles with motion sensing function, vehicle cameras such as drivingrecording systems and rear view camera systems, aerial photographydevices, sports photography equipment, all kinds of smart electronicsand wearable devices.

According to the aforementioned embodiments, a plurality of examples areprovided in cooperated with figures for details.

1st Example

Please refer to FIG. 4A, FIG. 4B, FIG. 4C and FIG. 4D. FIG. 4A is aschematic view of an optical lens assembly according to a 1st example ofthe present disclosure, FIG. 4B is an exploded view of the optical lensassembly according to the 1st example of the present disclosure, FIG. 4Cis a schematic view of a light blocking sheet 140 according to the 1stexample of the present disclosure, and FIG. 4D is a schematic view ofanother light blocking sheet 150 according to the 1st example of thepresent disclosure. In FIG. 4A, the optical lens assembly includes threelens elements and two light blocking sheets, that is, a first lenselement 110, the light blocking sheet 140, a second lens element 120,the light blocking sheet 150 and a third lens element 130. The lightblocking sheet 140 is received in a receiving space 141 between thefirst lens element 110 and the second lens element 120. When a widthparallel to the optical axis of the receiving space 141 is R1, R1 is0.038 mm. The light blocking sheet 150 is received in a receiving space151 between the second lens element 120 and the third lens element 130.When a width parallel to the optical axis of the receiving space 151 isR2, R2 is 0.038 mm.

As shown in FIG. 4A and FIG. 4B, the first lens element 110 and thesecond lens element 120 include a connecting structure 111 and aconnecting structure 121 a, respectively, for aligning the two lenselements with each other. The connecting structure 111 of the first lenselement 110 includes a connecting surface 112 and a circular conicalsurface 113. The connecting structure 121 a of the second lens element120 includes a connecting surface 122 a and a circular conical surface123 a. The connecting surfaces 112, 122 a are correspondingly connectedto each other, and the circular conical surfaces 113, 123 a arecorrespondingly connected to each other for forming the receiving space141. A vertical distance between the receiving space 141 and an opticalaxis is shorter than a vertical distance between each of the circularconical surfaces 113, 123 a and the optical axis. That is, the receivingspace 141 is closer to the optical axis than each of the circularconical surfaces 113, 123 a is thereto. The receiving space 141 is forreceiving the light blocking sheet 140, in which an outside diameter φ1of the light blocking sheet 140 is smaller than an outside diameter D11of the first lens element 110 and an outside diameter D12 of the secondlens element 120. The outside diameter φ1 of the light blocking sheet140 is smaller than or equal to a minimum diameter C11 of the circularconical surface 113 of the first lens element 110 and a minimum diameterC12 a of the circular conical surface 123 of the second lens element120. In the 1st example, D11 is 4.4 mm, D12 is 4.3 mm, 011 is 3.55 mm,and C12 a is 3.59 mm.

In the 1st example of FIG. 4C, an angle between the circular conicalsurface 113 of the first lens element 110 and the optical axis is 81, inwhich the angle between the circular conical surface 113 of the firstlens element 110 and the optical axis is equal to an angle between thecircular conical surface 123 a of the second lens element 120 and theoptical axis. The light blocking sheet 140 has a polygonal opening (thereference numerals are omitted). The polygonal opening has twenty innersides, and lengths of the inner sides are s1 and s2, separately.External angles formed between every two inner sides adjacent to eachother, which are less than 90 degrees, are θ1 and θ2, separately. Innerdiameters of the polygonal opening of the light blocking sheet 140 areφi1 and φi2, separately, and an outside diameter of the light blockingsheet 140 is φ1. The values of φ1, φi1, φi2, φi1/φ, φi2/φ, β1, s1, s2,θ1, θ2, θi1/(s1/2) and φi2/(s2/2) are listed as follows:

φ1 3.55 mm s1 0.57 mm φi1 2.12 mm s2 0.29 mm φi2 2.18 mm θ1 22.4 degreesφi1/φ 0.597 θ2 15 degrees φi2/φ 0.614 φi1/(s1/2) 7.439 β1 20 degreesφi2/(s2/2) 15.034

Furthermore, the second lens element 120 and the third lens element 130include a connecting structure 121 b and a connecting structure 131,respectively, for aligning the two lens elements with each other. Theconnecting structure 121 b of the second lens element 120 includes aconnecting surface 122 b and a circular conical surface 123 b. Theconnecting structure 131 of the third lens element 130 includes aconnecting surface 132 and a circular conical surface 133. Theconnecting surfaces 122 b, 132 are correspondingly connected to eachother, and the circular conical surfaces 123 b, 133 are correspondinglyconnected to each other for forming the receiving space 151. A verticaldistance between the receiving space 151 and the optical axis is shorterthan a vertical distance between each of the circular conical surfaces123 b, 133 and the optical axis. That is, the receiving space 151 iscloser to the optical axis than each of the circular conical surfaces123 b, 133 is thereto. The receiving space 151 is for receiving thelight blocking sheet 150, in which an outside diameter φ2 of the lightblocking sheet 150 is smaller than an outside diameter D12 of the secondlens element 120 and an outside diameter D13 of the third lens element130. The outside diameter φ2 of the light blocking sheet 150 is smallerthan or equal to a minimum diameter C12 b of the circular conicalsurface 123 b of the second lens element 120 and a minimum diameter C13of the circular conical surface 133 of the third lens element 130. Inthe 1st example, D12 is 4.3 mm, D13 is 4.9 mm, 012 b is 3.65 mm, and C13is 3.71 mm.

In the 1st example of FIG. 4D, an angle between the circular conicalsurface 123 b of the second lens element 120 and the optical axis is β2,in which the angle between the circular conical surface 123 b of thesecond lens element 120 and the optical axis is equal to an anglebetween the circular conical surface 133 of the third lens element 130and the optical axis. The light blocking sheet 150 has a polygonalopening (the reference numerals are omitted). The polygonal opening hassixteen inner sides, and a length of each inner side is s. An externalangle formed between every two inner sides, which is less than 90degrees, is θ. An inner diameter of the polygonal opening of the lightblocking sheet 150 is φi, and an outside diameter of the light blockingsheet 150 is φ2. The values of φ2, φi, φi/φ, β2, s, θ, and φi/(s/2) arelisted as follows:

φ2 3.55 mm s 0.43 mm φi 2.16 mm θ 22.5 degrees φi/φ 0.608 φi/(s/2)10.047 β2 30 degrees

In the 1st example, both the light blocking sheet 140 and the lightblocking sheet 150 are the composite light blocking sheets shown in FIG.1A. The inside substrate layers of the light blocking sheet 140 and thelight blocking sheet 150 are made of plastic materials, and the firstsurface layers and the second surface layers of the light blocking sheet140 and the light blocking sheet 150 are made of black carbon-containingmaterials.

The first lens element 110 further includes a flat surface 114, thesecond lens element 120 further includes a flat surface 124 a and a flatsurface 124 b, and the third lens element 130 further includes a flatsurface 134. The flat surfaces 114, 124 a are corresponding to thereceiving space 141 and vertical to the optical axis. The flat surfaces124 b, 134 are corresponding to the receiving space 151 and vertical tothe optical axis.

2nd Example

FIG. 5 is a schematic view of a light blocking sheet 240 of an opticallens assembly according to a 2nd example of the present disclosure. Theconfiguration between the optical lens assembly, the lens elements andthe light blocking sheet 240 of the 2nd example is the same as theconfiguration between the first lens element 110, the second lenselements 120 and the light blocking sheet 140 of the 1st example. Thus,there is no further description herein.

In the 2nd example of FIG. 5, the light blocking sheet 240 has apolygonal opening (the reference numerals are omitted). The polygonalopening has twelve inner sides, and a length of each inner side is s. Anexternal angle formed between every two inner sides, which is less than90 degrees, is θ. An inner diameter of the polygonal opening of thelight blocking sheet 240 is φi, and an outside diameter of the lightblocking sheet 240 is φ. The values of φ, φi, φi/φ, s, θ, and φi/(s/2)are listed as follows:

φ 3.55 mm s 0.56 mm φi 2.11 mm θ 30 degrees φi/φ 0.594 φi/(s/2) 7.536

In the 2nd example, the light blocking sheet 240 is the composite lightblocking sheets shown in FIG. 1A. The inside substrate layer of thelight blocking sheet 240 is made of a plastic material, and the firstsurface layer and the second surface layer of the light blocking sheet240 are made of black carbon-containing materials.

3rd Example

FIG. 6 is a schematic view of a light blocking sheet 340 of an opticallens assembly according to a 3rd example of the present disclosure. Theconfiguration between the optical lens assembly, the lens elements andthe light blocking sheet 340 of the 3rd example is the same as theconfiguration between the first lens element 110, the second lenselements 120 and the light blocking sheet 140 of the 1st example. Thus,there is no further description herein.

In the 3rd example of FIG. 6, the light blocking sheet 340 has apolygonal opening (the reference numerals are omitted). The polygonalopening has twenty-four inner sides, and a length of each inner side iss. An external angle formed between every two inner sides, which is lessthan 90 degrees, is θ. An inner diameter of the polygonal opening of thelight blocking sheet 340 is φi, and an outside diameter of the lightblocking sheet 340 is φ. The values of φ, φi, φi/φ, s, θ, and φi/(s/2)are listed as follows:

φ 3.55 mm s 0.29 mm φi 2.18 mm θ 15 degrees φi/φ 0.614 φi/(s/2) 15.034

In the 3rd example, the light blocking sheet 340 is the composite lightblocking sheets shown in FIG. 1A. The inside substrate layer of thelight blocking sheet 340 is made of a plastic material, and the firstsurface layer and the second surface layer of the light blocking sheet340 are made of black carbon-containing materials.

4th Example

FIG. 7 is a schematic view of a light blocking sheet 440 of an opticallens assembly according to a 4th example of the present disclosure. Theconfiguration between the optical lens assembly, the lens elements andthe light blocking sheet 440 of the 4th example is the same as theconfiguration between the first lens element 110, the second lenselements 120 and the light blocking sheet 140 of the 1st example. Thus,there is no further description herein.

In the 4th example of FIG. 7, the light blocking sheet 440 has apolygonal opening (the reference numerals are omitted). The polygonalopening has eighteen inner sides, and lengths of the inner sides are s1and s2, separately. External angles formed between every two innersides, which are less than 90 degrees, are θ1 and θ2, separately. Innerdiameters of the polygonal opening of the light blocking sheet 440 areφi1 and φi2, separately, and an outside diameter of the light blockingsheet 440 is φ. The values of φ, φi1, φi2, φi1/φ, φi2/φ, s1, s2, θ1, θ2,φi1/(s1/2) and φi2/(s2/2) are listed as follows:

φ 7.0 mm s2 1.35 mm φi1 5.15 mm θ1 22.4 degrees φi2 5.02 mm θ2 14.7degrees φi1/φ 0.736 φi1/(s1/2) 15.147 φi2/φ 0.717 φi2/(s2/2) 7.437 s10.68 mm

In the 4th example, the light blocking sheet 440 is the composite lightblocking sheets shown in FIG. 1A. The inside substrate layer of thelight blocking sheet 440 is made of a plastic material, and the firstsurface layer and the second surface layer of the light blocking sheet440 are made of black carbon-containing materials.

5th Example

FIG. 8 is a schematic view of an image capturing device 10 according toa 5th example of the present disclosure. As shown in FIG. 8, the imagecapturing device 10 of the 5th example is a camera module. The imagecapturing device 10 includes an imaging lens module 11, a drivingassembly 12 and an image sensor 13, in which the imaging lens module 11includes the optical lens assembly of the 1st example and a barrel (thereference numerals are omitted) for carrying the optical lens assembly.In the image capturing device 10, lights are focused by the imaging lensmodule 11 for generating an image, the driving assembly 12 is used toassist the imaging lens module 11 into focus, then the image is formedon the image sensor 13, and the data of the image is outputted.

The driving assembly 12 can be an auto-focus module, and a drivingmethod thereof can use a voice coil motor (VCM), a microelectro-mechanical system (MEMS), a piezoelectric system or a shapememory alloy system. The driving assembly 12 enables the imaging lensmodule 11 to obtain a preferable imaging position, so that the imagedobject in different object distances can be imaged clearly.

The image sensor 13 of the image capturing device 10 disposed on theimage surface of the imaging lens module 11 can have the properties ofhigh light sensitivity and low noise (such as CMOS and CCD), so that theexcellent image quality of the imaging lens module 11 can be trulypresented.

Moreover, the image capturing device 10 further includes an imagestabilization module 14, such as an accelerator, a gyroscope or a Halleffect sensor. In the 5th example, the image stabilization module 14 isbut not limited to the gyroscope. By adjusting the changes in differentaxial directions of the optical lens set, the blurry image resulting inthe shaking of the shooting moment can be compensated, so that the imagequality of dynamic scenes or low-light scenes can be enhanced.Furthermore, advanced image-compensating functions, such as an opticalimage stabilization (01S) or an electronic image stabilization (EIS) canbe provided.

6th Example

Please refer to FIG. 9A, FIG. 9B, FIG. 9C and FIG. 9D. FIG. 9A is aschematic view of an electronic apparatus 20 according to a 6thembodiment of the present disclosure, FIG. 9B is a perspective schematicview of the electronic apparatus 20 in FIG. 9A, FIG. 9C is a schematicview of the electronic apparatus 20 in FIG. 9A from another view angle,and FIG. 9D is a block diagram of the electronic apparatus 20 in FIG.9A. In FIG. 9A, FIG. 9B, FIG. 9C and FIG. 9D, the electronic device 20of the 6th example is a smart phone. The electronic device 20 includesthe image capturing device 10, a flash module 21, an auxiliary focusingmodule 22, an image signal processor 23, a user interface 24 and animage processing software 25. When a user shoots an imaged object 26with the electronic device 20 via the user interface 24, lights arefocused by the image capturing device 10 for generating an image, alight compensation function is provided by the flash module 21, theobject distance of the imaged object 26 is provided by the auxiliaryfocusing module 22 for focusing quickly, and an optimizing imageprocessing is provided by the image signal processor 23 and the imageprocessing software 25, so that the image quality can be furtherenhanced. The auxiliary focusing module 22 can adopt an infraredauxiliary focusing system or a laser auxiliary focusing system forfocusing quickly. The user interface 24 can adopt a touch screen or aphysical shooting button, and the image processing software 25 can becoordinated with the user interface 24 for providing a variety ofshooting modes and a variety of image processings.

The image capturing device 10 of the 6th example is the same as theimage capturing device 10 of the 5th example, and there is no furtherdescription herein.

7th Example

FIG. 10 is a schematic view of an electronic apparatus 30 according to a7th example of the present disclosure. In FIG. 10, the electronic device30 of the 7th example is a tablet personal computer. The electronicdevice 30 includes an image capturing device 31. The image capturingdevice 31 can be the same as that of the 5th example, and will not berepeated herein.

8th Example

FIG. 11 is a schematic view of an electronic apparatus 40 according toan 8th example of the present disclosure. In FIG. 11, the electronicdevice 40 of the 8th embodiment is a wearable device. The electronicdevice 40 includes an image capturing device 41. The image capturingdevice 41 can be the same as that of the 5th example, and will not berepeated herein.

Although the present disclosure has been described in considerabledetail with reference to certain embodiments thereof, other embodimentsare possible. Therefore, the spirit and scope of the appended claimsshould not be limited to the description of the embodiments containedherein.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentdisclosure without departing from the scope or spirit of the disclosure.In view of the foregoing, it is intended that the present disclosurecover modifications and variations of this disclosure provided they fallwithin the scope of the following claims.

What is claimed is:
 1. An optical lens assembly, comprising: at leasttwo lens elements, wherein each of the lens elements comprises aconnecting structure for aligning the two lens elements, and each of theconnecting structures comprises: a connecting surface; and a circularconical surface; wherein the connecting surfaces of the two lenselements are connected to each other, the circular conical surfaces ofthe two lens elements are connected to each other for forming areceiving space between the two lens elements, and a vertical distancebetween the receiving space and an optical axis is shorter than avertical distance between each of the circular conical surfaces and theoptical axis; and at least one light blocking sheet received in thereceiving space and having a polygonal opening, wherein an outsidediameter of the light blocking sheet is smaller than an outside diameterof each lens element, and the outside diameter of the light blockingsheet is smaller than or equal to a minimum diameter of the circularconical surface of each lens element; wherein the polygonal opening hasa plurality of inner sides, an inner diameter of the polygonal openingof the light blocking sheet is φi, a length of each inner side is s, andthe following condition is satisfied:7.1<φi/(s/2)<30.
 2. The optical lens assembly of claim 1, wherein thelight blocking sheet is a composite light blocking sheet and comprises:a first surface layer having a first opening; a second surface layerhaving a second opening; and an inside substrate layer having asubstrate opening and disposed between the first surface layer and thesecond surface layer to connect the first surface layer and the secondsurface layer; wherein the first opening, the second opening and thesubstrate opening are correspondingly disposed along the optical axis toform the polygonal opening.
 3. The optical lens assembly of claim 2,wherein the inside substrate layer is made of a plastic material, andthe first surface layer and the second surface layer are made of blackcarbon-containing materials.
 4. The optical lens assembly of claim 2,wherein an angle between each of the circular conical surfaces and theoptical axis is β, and the following condition is satisfied:0 degrees<β<40 degrees.
 5. The optical lens assembly of claim 2, whereineach of the lens elements further comprises: a flat surfacecorresponding to the receiving space and vertical to the optical axis.6. The optical lens assembly of claim 1, wherein at least one of the twolens elements is aligned to the light blocking sheet via the circularconical surface thereof.
 7. The optical lens assembly of claim 1,wherein the inner diameter of the polygonal opening of the lightblocking sheet is φi, an outside diameter of the light blocking sheet isφ, and the following condition is satisfied:0.47<φi/φ<0.90.
 8. The optical lens assembly of claim 7, wherein theinner diameter of the polygonal opening of the light blocking sheet isφi, the outside diameter of the light blocking sheet is φ, and thefollowing condition is satisfied:0.55<φi/φ<0.90.
 9. An imaging lens module, comprising: a barrel; and theoptical lens assembly of claim 1 disposed in the barrel; wherein thepolygonal opening of the light blocking sheet of the optical lensassembly is corresponding to a minimum central opening of the barrel,and the minimum central opening is an aperture stop of the imaging lensmodule.
 10. An electronic apparatus, comprising: the imaging lens moduleof claim 9; and an image sensor, wherein the image sensor is disposed onan image surface of the imaging lens module.
 11. An imaging lens module,comprising: a barrel; and an optical lens assembly disposed in thebarrel and comprising: a plurality of lens elements; and at least onelight blocking sheet having a polygonal opening, wherein the polygonalopening is corresponding to a minimum central opening of the barrel;wherein the polygonal opening has a plurality of inner sides, anexternal angle formed between every two inner sides adjacent to eachother, which is less than 90 degrees, is θ, and the following conditionis satisfied:9.0 degrees<θ<33.0 degrees.
 12. The imaging lens module of claim 11,wherein the light blocking sheet is a composite light blocking sheet andcomprises: a first surface layer having a first opening; a secondsurface layer having a second opening; and an inside substrate layerhaving a substrate opening and disposed between the first surface layerand the second surface layer to connect the first surface layer and thesecond surface layer; wherein the first opening, the second opening andthe substrate opening are correspondingly disposed along the opticalaxis to form the polygonal opening.
 13. The imaging lens module of claim12, wherein the inside substrate layer is made of a plastic material,and the first surface layer and the second surface layer are made ofblack carbon-containing materials.
 14. The imaging lens module of claim12, wherein the minimum central opening is an aperture stop of theimaging lens module.
 15. The imaging lens module of claim 12, wherein aninner diameter of the polygonal opening of the light blocking sheet isφi, an outside diameter of the light blocking sheet is φ, and thefollowing condition is satisfied:0.47<φi/φ<0.90.
 16. An electronic apparatus, comprising: the imaginglens module of claim 11; and an image sensor, wherein the image sensoris disposed on an image surface of the imaging lens module.